Letter to the Editor about the Ongre et al. publication: ‘Progression of fatigue in Parkinson’s disease-a 9-year follow-up’ (Eur J Neurol 2020. doi: 10.1111/ene.14520)

Vollstedt E-J, Warrlich E, Hauptmann B, Hanssen H, Klein C, Kasten M, EPIPARK Study Group
Eur J Neurol. 2021 Jun;28(6):e35-e36. doi: 10.1111/ene.14740. Epub 2021 Mar 20.
https://pubmed.ncbi.nlm.nih.gov/33459455/